Data Sources

CustomsCheck combines AI-generated guidance with data drawn from official government customs authorities and international trade organisations. The platform also relies on trusted third-party services for authentication, data storage, and advertising. Below are the primary sources and services we use. Always verify critical customs information directly with the relevant authority before travelling.

• World Customs Organization (WCO)

  International Standards

  International standards body for customs procedures, the Harmonized System (HS) commodity codes, and cross-border trade facilitation.

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• IATA Travel Centre

  Travel Regulations

  Airline and travel industry data covering passenger regulations, restricted items, and country-specific entry requirements.

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• U.S. Customs and Border Protection (CBP)

  National Customs Authority

  Official U.S. government source for customs declarations, duty-free allowances, prohibited and restricted items for travellers entering the United States.

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• UK Border Force / HMRC

  National Customs Authority

  Official UK government guidance on customs allowances, duty rates, and restricted goods for travellers arriving in Great Britain and Northern Ireland.

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• European Union Taxation and Customs Union

  Regional Customs Authority

  EU-wide customs rules, duty-free thresholds, VAT regulations, and prohibited goods lists for travel within and into the European Union.

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• Australian Border Force (ABF)

  National Customs Authority

  Australian government customs and biosecurity rules, including strict biosecurity declarations and duty-free allowances for incoming travellers.

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• Google Gemini (AI)

  AI & Technology

  Google's multimodal AI model, used to power the Item Scanner (photo-based item recognition) and to generate customs guidance results. Free-tier users are served by Gemini 2.5 Flash; paid-tier users by a more powerful Gemini model for larger batches and faster results. Image data is processed in real time and not stored. AI outputs may be inaccurate — always verify with official sources.

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• Supabase

  Platform & Infrastructure

  Backend-as-a-service platform providing authentication and database infrastructure for CustomsCheck user accounts. Handles secure sign-up and login (email/password), stores user profiles (including account tier and billing details for paid users), and persists trip history and search history for signed-in users. SOC 2 Type II certified.

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• Google AdSense

  AI & Technology

  Google's advertising platform used to serve ads on CustomsCheck, enabling the service to remain free for all users. Ad personalisation is subject to your cookie consent preferences and Google's advertising policies.

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Customs regulations change frequently. CustomsCheck is not affiliated with any of the above organisations. Always consult official sources for the most up-to-date requirements.